GHS delayed - again

Sounds familiar? According to the Office of Management and Budget, the review of the final rule has again been delayed. I remember that I went through an informational session two years ago and that the expectations were high that we all would soon be on one page, that the global system would be in place soon. So how come that we here in the US have to be at least one if not two or three steps behind, that other countries are using the system but that we cannot get the final rule into place?